Machine for making horseshoe-calks.



PATEN'TBD APR. 26, 1904.

J. H. VINTON. MACHINE FOR MAKING HORSESHOE CALKS.

APPLICATION FILED 'TAN'. 19, 1903.

4 SHEETS-SHEET 1.

N0 IODEL.

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No. 758,607.) PATENTBD APR. 26, 1904.

J. H. VINTON. MACHINE PoR MAKING. HoRsEsHoE GALKS APPLICATION FILED JAN. 19, 1903.

lPAIEN'I'ED APR.V 26,1904.

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J. H. V'INToN. A MACHINE PoR MAKING HoRsBsHoE oALKs.

APPLIUATION FILED JAN. 19l 1903.

N0 MODEL.

Nb. 758,607. PATENTED APR. 26, 1904'.

J. H. VINTQN.

MACHINE POR'MAKING HORSESHOE GALKS.

APPLIOATIN FILED JAH. 19, 1903. N0 MODEL.

4 SHEETS-SHEET 4.

NO. V'758,607'.

UNITED STATES Patented April 26,1904.

PATENT OFFICE.

i JOHN H. VINTON, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF TWO- THIRDS TO WILLIAM W. POTTER, OF BROOKLINE, yMASSACHU- SETTS, AND JAMES T. MINOHIN, OF MALDEN, MASSACHUSETTS.

MACHINE FOR MAKING HORSESHOE-CALKS. y

SPECIFICATION fOlming part of Letters Patent No. 758,607, dated April 26, 1904.

Application filed January 19, 1903. Serial No. 139,521. (No model.)

vTo t/Z whom-ift 777mg/ concern:

Be it known that I` JOHN H. VIN'roN, of Boston,vcounty of Suffolk, State of Massachusetts,

have invented an Improvement in Machines for Making Toe-Oalks, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to machines for making horseshoe toe-calks.

Heretofore, so far as I amaware, it has been customary in the manufacture of toe-calks by machine to feed a long rod or bar which is properly heated to the machine and by suitable mechanism to cut olf short lengths from said bar, which constitute the blanks from which the toe-calks are produced. Machines 1- operating on this principle are very complicated, and the blanks which are cut off of the heated bar are imperfect and not uniform.

In my machine the blanks are previously cut off of a cold bar and are heated and the hot-blanks delivered automatically to the spurforming devices as required. The coldout blanks are much more perfect and uniform,`

and the finished toe-calks are manifestly of improved construction.

The invention has for its object to provide means for feedingthe hot blanks one at a time into a position to be engaged by the spur-forming devices, which means does not grip the blank, and thereby indent or injure it; also, to provide clamping mechanism for holding the hot blank while the spur is being produced at one end thereof; also, to provide novel means for operating a horizontally-sliding indenting-tool, which acts upon one side of the blank at one end thereof with a severe thrust in contradistinction to a blow, said tool forcing the metal outward into the path of movement of an end-swaging tool, and thereby assisting in the production of the spur at the end of the blank. The action of said indenting-tool is opposed by a similarly-formed tool, which serves as a rest or support. The indenting-tool and the rest or support constitute the side spur-forming devices. In producing the spur Aan oscillating end-swaging tool is provided which is adapted to make several successive excursions,.acting to draw down the metal on its downward stroke, and each time said tool is making its upward stroke the side-indenting tool engages the blank and by a direct thrust `thereon forces the metal outward into the path of said endswaging tool. Therefore both the end-swaging tool and theY side-indenting tool make several successive excursions.

The'invention also has for its object to provide novel means for varying the stroke of said indenting-tool whereby said tool will more deeply indent the blank at each successive stroke and finally return to its normal position after the toe-calk is finished.

The invention also has for its object certain details of construction, which will be hereinafter more fully described.

Figure 1 is a front elevation of a machine for making toe-calks embodying this invention. Fig. 2 is a plan View of the machine shown in Fig. l. Fig. 3 is a vertical section of the machine shown in Fig. 2, taken' on the dotted line 3 3. Fig. l is a vertical section of the upper part of the machine shown in Fig. 2, taken on the dotted line 4 4. Fig. 5 is a vertical section of the upper part of the machine shown in Fig. 2, taken on the dotted line 5 5.v Fig. 6 is a detail of the means for controlling the action of the indenting-tool. Fig. 7 is a detail of one of the clamping-jaws, showing the means employed for cooling the same, said cooling means being applicable to both clamping-jaws. Figs. 8 andQrepresent the side and end views of a finished toe-calk.

The furnace c, which is herein shown as employed to heat the blanks, is of any wellknown or suitable construction; but herein it is shown as having a declining shelf a' passing ,through it from end to end, on which the blanks?) are placed and on which they are moved'down by a suitable feeding device to a raceway c2, which leads from the furnace to the machine.

-As a feeding device for feeding the blanks b through the furnace I employ a plunger a3, which rests upon the shelf lr, an arm pivoted atc, the upper end of whichis connected with said plunger a3 by a link a, a spring e7, acting upon said arm to move it outward, and a cam es, acting upon said arm to move it inward or in opposition to the spring. The cam asis secured to a shaft ci, which is driven by a belt-pulley al, around which passes a belt am. Each revolution of the cam L8 moves the arm to in turn move the plunger L3 and advance the blanks Z), which rest upon the shelf a'. The blanks b are moved each time by the plunger a distance equal to the width of a blank. When the plunger is returned to its normal position, a space is produced into which a new blank will be placed by hand or otherwise. The shaft a will be timed with reference to the machine so as to operate the feeding device to feed the blanks along at the proper time for the operation of the machine. The blanks, which are placed on the shelf in advance of the plunger, one at a time are cut off of a cold rod or bar by any ordinary cutting-off tool and are much more perfect and uniform than ifcut off of a heated rod or bar. The blanks which are employed are rectangular in cross-section` and they are laid upon the declined shelf with one of their widest faces in contact with the shelf or tlatwise; but said blanks are held by the clamping mechanism edgewise while the spur-formingdeviees act, and consequently they are given a quarter-turn in passing' from the raceway to a position in f ront of the feeding-plunger, and to effect this result the bottom of the raceway at the end is curved, as shown at an. Along the curvedend portion of the raceway a plate al is provided, which prevents the blanks turning over in the raceway, thereby insuring their delivery to a position in front of the feedingplunger in an edgewise position. The curved end of the raceway terminates at the stationary bed-plate c, and the end of the raceway and the plate a serve as a pair of parallel side walls above the bed-plate, which act to hold the blank in a predetermined position on the bed-plate.

A feeding device is provided for sliding the blank along on the bed-plate until its forward end projects beyond the front edge of the bed-plate for a short distance. As herein shown, this feeding device consists of a horizontally-disposed plunger (.7, (see Figs. 2 and 4,) attached to a plate (Z, which slides in suitable guideways provided for it, and on top of this plate a stud Z2 projects which enters or passes through the slot in one end of an arm d of a bell-crank lever, which is pivoted at d", the other arm, (Z5, of said lever having a roll which engages a cam d, secured to a shaft Z Upon each revolution of the shaft Z7 the cam d" operates the bell-crank lever and moves the plate carrying the plunger in one direction, and a weight d", which is connected to said plate by a cord or chain d",

moves said plate in the opposite direction. The plunger d works between the parallel side walls when sliding the4 blank longitudinally on the bed-plate, and said plunger engages the rear end of the blank and pushes it along until the forward end of the blank projects beyond the front edge of the bed-plate and holds the blank against rearward movement until kthe clamp (to be described) engages the sides of the blank and also until the end-swaging tool (te be described) makes one downward stroke. A

The clamp which holds the blank while the spur-forming devices operate upon it consists, essentially, of a stationary member e and a movable member f. The stationary member e comprises a bar having a dovetailed recess at the end and a hardened steel blocks', having a dovetailed projection which enters said recess, and said member is located in front of the side walls and extends from said side walls to the front edge of the bed-plate. The movable member of the clamp comprises a sliding bar having a dovetailed recess and a block f', having a dovetailed projection which enters said recess, said block f being constructed like unto the block a and likewise extends from the side walls to the front edge ofthe bed-plate. As the member f is moved in and out, the blank will be engaged and released, and as the members of the clamp extend from the side walls to the front edge of the bed-plate the blank will be engaged for nearly its entire length, only the front end portion thereof which projects beyond the front edge of the bed-plate being disengaged. The member f is reciprocated by means of a toggle-lever fzf, one member of which is connected with the bar j' and the other member with a stationary support, and said toggle-lever is connected by a link f4 with a sliding bar f, having a roll at its cxtremity which engages a cam fr', secured to a shaft rf, and also having' an arm f7, provided with a roll which engages the cam fx, also secured to said shaft (Z7. Upon each revolution of the shaft Z7 the cams will operate the toggle-lever and move the clamping member f in and out, there being suitable dwells on the cams by which said clamping member is held in its eXtreme positions for short intervals of time-as, for instance, it is held in one extreme position in engagement with the blank while the forming devices operate upon it and is held in its other extreme position while the finished toe-calk is being ejected and a new blank brought into position.

The clamping bars or members e f while holding the hot blanks would become heated in a short time to a very high temperature if means were not provided for cooling them, and herein each member is cooled by the iow of water through it. Referring to Fig. 7, the clamping member e is shown as bored out at `each end (see dotted lines) to provide water IOO ITO

ed on the shaft 8.

ways or passages, and a water-pipe @wis connected to said water Ways or passages. similar water-pipe is connected to the other clamping member f.

The end of the by side-forming devices and. an end-forming device, the former acting by indentation and the latter by a swaging action, and each `of said devices are adapted to operate successively a number of times to there by completely form and nish the spur. rlhe side-forming devices comprise a rest or support and an indenting-tool located on opposite sides of the projecting end of the blank and directly in front of the front edge of the bed-plate, and the end-forming device consists of a swagingtool. The two side-forming devices are movable toward and from each other in a hori- Zontal plane and act by a direct thrust upon the blank to force the metal outward. rlhe side-forming device, which serves as a rest, consists of a support a', mounted on and secured to a block vl', which is adapted to slide in suitable ways provided for it. One member, 2, of a toggle-lever is connected to said block t, and the other member, a3, of said lever is connected to an ear on a bracket ai, which is connected to the machine-frame. The toggle-lever 2 3 is connected by a link 5 to a sliding block 6, which slides in suitable guideways provided for it, and Vsaid sliding block vll is connected to an eccentric 7, mount- As the shaft s is revolved the toggle-lever will be operated to move the rest or support i in and out. The movement of this member is only slight, being from'a position substantially flush with the face of the clamping member e to a position somewhat remote therefrom, and when brought up flush with the clamping member it` engages 'the blank and by bearing upon it resists or opposes the action of the indenting-tool, which is located at the opposite side of the blank. Movement of the rest ci is provided for the purpose of enabling the blank to be held so thatthe `spur may be correctly formed on it and also so that the finished toe-calk may be ejected, and consequently but a slight movement is required. The other side-forming device consists of an indenting-tool n, which is made similar to the rest and is attached to a sliding block n', movable in suitable guideways provided for it. One member, n2, of a toggle-lever is connected to said block n and the other member, n3, of said toggle-lever is connected to a support "11,4, movably supported by the machine-frame. The togglelever u2 12,3 is connected by a link a5 to a sliding block n, which slides in suitable guide-ways provided for it, and said sliding block n is connected to an eccentric a7, mounted on the shaft 8. As the shaft 718 is revolved the toggle-lever will be operated Vto-move in and out the indenting-tool.A The movement of this tool is blank which projects beyond the front edge of the bed-plate is acted upon l volvcs the cam will operate considerable and of necessity is variable, so as vto indent the block deeper on each successive lpasses through the machine-frame, and a weight 71,9 is connected by a cord or chain to this stem. The stem as also passes through a slot n.12 in a vertically-disposed wedge nl", and the weight draws the support into continuous engagement with said wedge. Normally or at the beginning of the several successive strokes of the indenting-tool the Wedge is in its lowermost position, as shown in Fig. 3, and with the wedge in this position and the indentingtool operated a shallow indentation will be made in the projecting end of the blank; but as the wedge is raised step by step and the indenting-tool 'operated the indentation will be made deeper and deeper in the blank. To'

raise the wedge nw step by step at regular intervals of time for each successive stroke' of the indenting-tool, said wedge has connected to it a rod or bar n, having a roll at its eX- tremity which bears upon a 'cam nl, secured to a shaft nl?, to which a sprocket-wheel als is secured, over which passes a sprocket-chain nl, which passes over a sprocket-wheel n2, secured to the shaft 8. The shaft s is operated four complete revolutions to operate the indenting-tool in order that said tool may make fou r successive indentations in the block,

and during these four revolutions of said shaft the shaft n will be rotated one complete revolution and the wedge will be raised to three different elevations and then permitted 16 gages the cam n The indenting-tool n forces the metal outward into the path of movement of an oscillating end-forming device or swaging-tool. Thev end-forming device or swaging-tool operates repeatedly like the side-forming devices, but alternately with respect thereto, so as to draw down the metal which has been previously forced outward by the indentingtool. The swaging-tool consists of an arm 0, pivoted at 0 and bearing a swaging-roll o2, which is located in front of the projecting endof the blank, so that it will engage said end when operated. The opposite end of the arm 0 bears a roll 03, which engages a cam of, secured to the shaft 8, and said arm o is held with its roll 03 in constant engagement with said cam by a weight 05. As the shaft s rethe arm o, and as IOO IIO

said arm oscillates the projecting end of the blank will be repeatedly engaged and with the assistance of the side-forming devices the spur will be produced. The pivot-rod n of the arm o is mounted in a support or plate o", which is adjustably connected to the machineframe by bolts 2 or otherwise, and set-screws 3 are provided for assisting in holding said support in a fixed position. The swagingtool makes its stroke While the indenting-tool and rest are removed from the blank.

In order that the shaft s may operate intermittently and at the proper time with respect to the continuously-operating shaft (f, a clutch of any suitable description and size (represented at p) is provided for said shaft s and a lever p provided for operating said clutch, which is pivoted at p2, the outer ex- 'tremity of said lever bearing a finger p10,

which is operated upon by suitable cam-shaped teeth on the disks 223114, there being one tooth on each disk, which operates to move the pivoted clutch-operating lever first in one and then in the other direction. The disks p p4 are secured to the continuously-operating shaft d?. A pinion t is secured to one member of the clutch p, which is engaged by an idle gear t', which is engaged by a gear t2, secured tothe main shaft a of the machine, and a gear t3 is also secured to said main shaft which engages a gear t4, secured to the shaft (Z7. The main shaft a is made as a hollow shaft and has a rod u' passing through it adapted to be moved longitudinally by a pivoted lever a2, which is connected toit at one end, the opposite end of said lever having a crossbar uf secured to it, which passes through slots in the main shaft, anda friction rim or ring u* is secured to said cross-bar which is moved by said cross-bar into engagement with the main driving-pulley a5 or with the fixed drum uf. The shaft s makes four complete revolutions and then dwells a certain length of time during each revolution of the shaft cf, and while the shaft 8 dwells the shaft Z7 advances the feeding device to feed forward the blank and eject the blank ahead of it; but said feeding device will be restored to its normal position while the shaft s is operating', the beginning of the return stroke of the feeding device taking place just as soon as the end-swaging tool has made 011e stroke. Also while the shaft 7S dwells the clamp which engages the blank is moved to disengage the blank in order that said blank may be ejected and is moved to engage the next blank which is brought into position by the feeding device. As soon as a toe-calk is produced the next blank will be slid along on the bed-plate or fed forward by the plunger d, and said blank will act to eject the finished toe-calk, and as said finished toecalk is thrust forward by the blank behind it it will strike the swaging-roll o2 and will be directed by said roll in a downward direction. The cold-cut blank is thus delivered upon the bed-plate at a predetermined point in front of the plunger and there held in correct position, and by said plunger is slid along on the bed-plate until its forward end projects beyond the front edge of the bed-plate and into the path of engagement of the spur-forming devices, and by means of the clamping mechanism the blank is held in this latter position firmly while the spur is being formed, and finally the finished toe-calk is ejected.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a machine for making toe-calks, the combination of a bed-plate, spur-forming devices located at the front edge thereof comprising side-forming devices and an end-forming tool, means for delivering a blank upon said bed-plate, a horizontally-movable plunger which engages the rear end of the blank, means for operating said plunger to slide the blank longitudinally along on said bed-plate until its forward end projects therefrom into the path of engagement of the spur-forming devices, and to hold said blank against rearward movement while the end-forming tool operates, and means for engaging the sides of the blank to hold it in fixed position on the bed-plate while the spur-forming devices operate and form the spur, substantially as described.

2. In a machine for making toe-calks, the combination of a bed-plate, spur-forming devices located at the front edge thereof, comprising side-forming devices and an end-forming tool, means for delivering a blank upon said bed-plate, a blank moving, holding and ejecting plunger which engages the end of the blank, means for operating said plunger to slide the blank longitudinally along on said bed-plate until its forward end projects therefrom into the path of engagement of the spurforming devices and to hold said blank against rearward movement while the end-forming tool operates and to finally eject the finished toe-calk, and means for engaging the sides of the blank for holding it in fixed position on the bed-plate while the spur-forming devices operate and form the spur, substantially as described.

3. In a machine for making toe-calks, the combination with means for holding the blank in fixed position while the spur is beingformed, of a pair of movable side-forming devices for the spur, a toggle-lever connected at one end to one of said devices, a movable support to which the other end of said toggle-lever is connected, means for moving said support inwardly on each operation of the toggle-lever for several successive operations thereof, and then restoring said support to its normal position, substantially as described.

4. In a machine for making toe-calks, the combination with means for holding the blank in fixed position while the spur is being formed,

of a pair of movable sidefforming devices for the spur, a toggle-lever connected at one end to one of said devices, a movable support to which the other end of said toggle-lever is connected, a wedge located back of said support, means for operating said toggle -lever and means for advancing said wedge on each operation of the toggle-lever for several successive operations, and then restoring the wedge to its normal position, substantially as described.

5. In a machine for making toe-calks, the combination with means for holding the blank' in fixed position while the spur is beingformed, of a pair of sliding side-forming tools for the spur, a toggle-lever connected at one end to one of said tools, a horizontally-movable support to which the other end of said toggle-lever is connected, a vertically-movable Wedge located back of said support, means for advancing the wedge on each successive operation of the toggle-lever for several successive operations thereof, and for then retreating said wedge to its normal position, and an eccentric, the strap of which is connected to said toggle-lever, substantially as described.

6. In a machine for making toe-calks, the combination of a bed-plate, a pair of sliding spur-forming tools located at the front edge thereof, toggle-levers connected with said tools and an intermittingly-operating shaft for operating said toggle-levers, means for feeding the blank forward into the path of engagement with said spur-forming tools, means for holding the Vblank in its forward position while. the forming-tools operate, and a continuously-operating shaft for operating said feeding and blank-holding devices, subsitantially as described.

7. In a machine for making toe-calks, the combination with means for holding the blank in a xed position while the spur is being formed, of a pair of side-forming devices for the spur, means for operating them successively, an oscillating end-swaging tool and means for operating it successively, Yalternately with relation to the side-forming devices, said tool being normally so disposed in front of the blank as to direct the finished toe-calk downward when the latter is thrust into engagement with it, and means for moving said finished toe-calk forward. into engagementwith said tool to eject it, substantially as described.

8. In a machine for making toe-calks, the

combination with means for holding a blank in fixed position while the spur is being formed, of a pair of sliding side -forming devices for the spur, means for operating them successively, an oscillating end-swaging tool, and means for operating it successively, alternately with relation to the side-forming devices a support for said swaging-tool, and means for adjusting it in and out, substantially asdescribed. 9. In a machine for makingtoe-calks, the combination with means for holding ablank in fixed position, and a continuously-operating shaft for said means, of a pair of sliding side-forming devices, toggle-levers connected thereto, eccentrics, the straps of which are connected to said toggle-levers, and an intermittingly-operated shaft upon which said eccentrics are mounted, substantially as described. A

l0. In a machine for making toecalks, the combination of spur-forming devices and an intermittngly operated shaft therefor, of blank-holding mechanism, and means for operating it while said shaft is at rest, substantially as described.

l1. In a machine for making toe-calks, the combination of spur-forming devices and an intermittingly operated shaft therefor, of blank feeding and ejecting mechanism, and blank-holding mechanism, and means for operating said mechanisms while said shaft is at rest, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN H. VINTON.

Witnesses:

B. J. NoYEs, L. H. HAMMAN. 

